linux-kernel - Re: [PATCH] mmc: Kconfig: Add dependency on GPIOLIB for MMC

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Date:	Thu, 27 Aug 2015 13:43:57 +0200
From:	Michal Simek <michal.simek@...inx.com>
To:	Ulf Hansson <ulf.hansson@...aro.org>,
	Michal Simek <michal.simek@...inx.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Michal Simek" <monstr@...str.eu>,
	Scott Branden <sbranden@...adcom.com>,
	Weijun Yang <Weijun.Yang@....com>,
	Andrew Bresticker <abrestic@...omium.org>,
	"Jean Delvare" <jdelvare@...e.de>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"Alim Akhtar" <alim.akhtar@...sung.com>,
	addy ke <addy.ke@...k-chips.com>,
	"Stephen Boyd" <sboyd@...eaurora.org>,
	Chaotian Jing <chaotian.jing@...iatek.com>,
	Kevin Hao <haokexin@...il.com>,
	Vincent Yang <vincent.yang.fujitsu@...il.com>
Subject: Re: [PATCH] mmc: Kconfig: Add dependency on GPIOLIB for MMC_SDHCI

Hi Ulf,

On 08/27/2015 01:32 PM, Ulf Hansson wrote:
> On 25 August 2015 at 14:04, Ulf Hansson <ulf.hansson@...aro.org> wrote:
>> On 6 August 2015 at 07:39, Michal Simek <michal.simek@...inx.com> wrote:
>>> Add GPIOLIB dependency for MMC_SDHCI.
>>>
>>> Problem was observed after adding the patch
>>> "mmc: sdhci-of-arasan: Call OF parsing for MMC"
>>> (sha1: 16b23787fc709fe60c5d2bd05927b1a3da33d4e9) which calls
>>> mmc_of_parse() -> mmc_gpiod_request_cd() (slot-gpio.c) which
>>> calls devm_gpiod_get_index() which returns -ENOSYS.
>>>
>>> Error log:
>>> sdhci-arasan ff160000.sdhci: parsing dt failed (4294967258)
>>> sdhci-arasan: probe of ff160000.sdhci failed with error -38
>>>
>>> Signed-off-by: Michal Simek <michal.simek@...inx.com>
>>
>> Thanks, applied for next!
> 
> kbuild test robot reports a warning for this one, so I am dropping it
> from my next branch.

I think is just better to fix the problem there instead of dropping this
patch which fix GPIO dependency.

Fix is quite easy.
diff --git a/arch/powerpc/platforms/44x/Kconfig
b/arch/powerpc/platforms/44x/Kconfig
index 5538e57c36c1..874f07c7d0b8 100644
--- a/arch/powerpc/platforms/44x/Kconfig
+++ b/arch/powerpc/platforms/44x/Kconfig
@@ -219,6 +219,7 @@ config AKEBONO
        select USB_EHCI_HCD_PLATFORM if USB_EHCI_HCD
        select MMC_SDHCI
        select MMC_SDHCI_PLTFM
+       select GPIOLIB
        select ATA
        select SATA_AHCI_PLATFORM
        help

But the question is if we should keep these ancient targets in the tree.

I am happy to send this patch but it should go via PPC tree. Or are you
happy to apply it to your tree?

Thanks,
Michal
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